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3 article(s) from Liu, Yunyun

Synthesis of β-arylated alkylamides via Pd-catalyzed one-pot installation of a directing group and C(sp³)–H arylation

Yunyun Liu,
Yi Zhang,
Xiaoji Cao and
Jie-Ping Wan

Beilstein J. Org. Chem. 2016, 12, 1122–1126, doi:10.3762/bjoc.12.108

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Scheme 1: Double C–H arylation of N-AQ acetamide.

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Scheme 2: Double C–H arylation of N-AQ cyclohexylformamide.

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Full Research Paper

Published 03 Jun 2016

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C–H bond halogenation catalyzed or mediated by copper: an overview

Wenyan Hao and
Yunyun Liu

Beilstein J. Org. Chem. 2015, 11, 2132–2144, doi:10.3762/bjoc.11.230

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Scheme 1: Copper-catalyzed C–H bond halogenation of 2-arylpyridine.

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Scheme 2: ortho-Chlorination of 2-arylpridines with acyl chlorides.

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Scheme 3: Copper-catalyzed chlorination of 2-arylpyridines using LiCl.

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Scheme 4: Copper-catalyzed C–H halogenation of 2-arylpyridines using LiX.

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Scheme 5: Copper-mediated selective C–H halogenations of 2-arylpyridine.

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Scheme 6: Copper-catalyzed C–H o-halogenation using removable DG.

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Scheme 7: Copper-catalyzed C–H halogenations using PIP as DG.

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Scheme 8: Copper-catalyzed quinoline C–H chlorination.

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Scheme 9: Copper-catalyzed arene C–H fluorination of benzamides.

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Scheme 10: Copper-catalyzed arene C–H iodination of 1,3-azoles.

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Scheme 11: Copper-catalyzed C–H halogenations of phenols.

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Scheme 12: Proposed mechanism for the C–H halogenation of phenols.

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Scheme 13: Copper-catalyzed halogenation of electron enriched arenes.

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Scheme 14: Copper-catalyzed C–H bromination of arenes.

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Scheme 15: CuI-mediated synthesis of iododibenzo[b,d]furans via C–H functionalization.

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Scheme 16: Cu-Mn spinel oxide-catalyzed phenol and heteroarene halogenation.

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Scheme 17: Copper-catalyzed halogenations of 2-amino-1,3thiazoles.

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Scheme 18: Copper-mediated chlorination and bromination of indolizines.

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Scheme 19: Copper-catalyzed three-component synthesis of bromoindolizines.

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Scheme 20: Copper-mediated C–H halogenation of azacalix[1]arene[3]pyridines.

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Scheme 21: Copper-mediated cascade synthesis of halogenated pyrrolones.

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Scheme 22: Copper-mediated alkene C–H chlorination in spirothienooxindole.

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Scheme 23: Copper-catalyzed remote C–H chlorination of alkyl hydroperoxides.

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Scheme 24: Copper-catalyzed C–H fluorination of alkanes.

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Scheme 25: Copper-catalyzed or mediated C–H halogenations of active C(sp³)-bonds.

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Published 09 Nov 2015

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Secondary amine-initiated three-component synthesis of 3,4-dihydropyrimidinones and thiones involving alkynes, aldehydes and thiourea/urea

Jie-Ping Wan,
Yunfang Lin,
Kaikai Hu and
Yunyun Liu

Beilstein J. Org. Chem. 2014, 10, 287–292, doi:10.3762/bjoc.10.25

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Figure 1: Some DHPMs-based lead compounds.

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Scheme 1: Regioselective 1,3-thiazines and DHPMs via aldehydes, ureas/thioureas and alkynes.

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Scheme 2: Synthesis of enamino ester intermediate and its transformation to DHPM.

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Scheme 3: Proposed reaction mechanism.

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Letter

Published 29 Jan 2014

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Synthesis of β-arylated alkylamides via Pd-catalyzed one-pot installation of a directing group and C(sp3)–H arylation

C–H bond halogenation catalyzed or mediated by copper: an overview

Secondary amine-initiated three-component synthesis of 3,4-dihydropyrimidinones and thiones involving alkynes, aldehydes and thiourea/urea

Synthesis of β-arylated alkylamides via Pd-catalyzed one-pot installation of a directing group and C(sp³)–H arylation